chore: set minimum Node.js version to 18.0.0

Update the engines field in package.json and the min-node-version in
the build and release CI workflows. This also lets eslint-plugin-n
flag usage of APIs unavailable in the supported version range.

Author: watson

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
     with:
       package-manager: 'yarn'
       cache: false
-      min-node-version: 16
+      min-node-version: 18
       rust: true
       only: darwin-arm64,darwin-x64,linux-arm64,linux-x64
 

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
     with:
       package-manager: 'yarn'
       cache: false
-      min-node-version: 16
+      min-node-version: 18
       rust: true
       only: darwin-arm64,darwin-x64,linux-arm64,linux-x64
 

package.json

@@ -37,5 +37,8 @@
     "eslint-plugin-n": "^17.24.0",
     "eslint-plugin-unicorn": "^63.0.0",
     "globals": "^17.4.0"
+  },
+  "engines": {
+    "node": ">=18.0.0"
   }
 }